White House Budget Director Mick Mulvaney is signaling similar flexibility, saying on CNN Sunday that decisions about deductions remain up in the air as “the bill is not finished yet.” He took it a step further on Fox News Sunday, by adding that a tax plan that doesn’t add to the deficit won’t spur growth.

“I’ve been very candid about this. We need to have new deficits because of that. We need to have the growth,” Mulvaney said.